Toyota may have been spied on during a factory 'open day' at the weekend. That's the claim of German-born F1 team driver Ralf Schumacher. To raise money for the German Red Cross' tsunami relief effort, for the first time ever, Cologne swung open their F1 HQ and donated every dollar. But Ralf, 29, reckons some F1 rivals probably sent along a sly photographer or two. ''Actually, I'm surprised that Toyota opened the door at all,'' said the younger Schumacher. He added: ''I asked myself at the time if there could be someone from Ferrari or Williams there.''